1999 TOYOTA 3C-T TURBO ENGINE. Building air preasure in the radiator. Engine oil is clean,
starts fine? The engine starts fine. Builds air pressure and pushes out coolant through the relief valve on the radiator cap even when cold. The engine oil is not contaminated and the water has no sign of fuel or oil
Cracked Cyl. head, (in the combustion chamber) The crack will allow combustion gases (very high PSI) to pass, but not coolant (16 PSI) to pass. Very hard to find, even a compression test will not show this up.
Possible cylinder head water jacket or block crack or possible blown head gasket allowing compression into a water jacket.
You may not see signs of fuel in the coolant due to it being diesel and fuel is injected just before the piston is at top dead center, meaning uncontaminated air can be pushed into the cooling system before fuel is introduced into the system.
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1999 TOYOTA 3C-T TURBO ENGINE. Building air preasure in the radiator. Engine oil is clean,
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